Process of producing erythrene.



* UNITED STATES PATENT OFFICE.

GEORG MERLING- AND HUGO K6HLER, OF ELBERFELD, GERMANY, ASSIGNORS T0 FAR- BENFABRIKEN VORM. FRIEDR. BAYER & 00., OF ELBERFELD, GERMANY, A COR- PORATION OF GERMANY.

PROCESS OF PRODUCING ERY'IHRENE.

No Drawing.

To all whom it may concern:

Be it known that we, GEORG MERLING and Specification of Letters Patent. Application filed November 21, 1911.

Patented Aug. 2'7, 1912. .Serial No. 661,535.

tained from alpha-methylallyldimethylamin by convertingthe latter (obtainable from alpha methyltrimethylenedimethylammonium hydroxid) into the completely alkylated alpha-methylallyltri-methylammonium base and decomposing this base into trimethylamin and water.

The following formulae illustrate the process which probably takes place:

Alphamethyltr imethyleuedimethylammonium hydroxid.

CH3 Alpha-methylallyldimethylamin.

' Alpha-methylellyltrimethylammoniu m hydroxid.

- Fz'rst phase of reaction, production ofolammonium hydroxid' into water and alpha- 1nethylallyldimethylamin .of a small quantity of water and alcohol.

Alpha-methylallyldimethylamin is a thin colorless oil with a coiine'like-odor, which boils under atmospheric pressure at from 9093 C. and decolorizes permanganate in dilute sulfuricacid solution. The base combineswith methyl chlorid to alpha-methylcaustic potash and purified" Erythrene.

allyl-trimethylammonium chlorid, which is easily soluble in'water and alcohol.

Second phase of reaction, decomposition into erytIz-rene.Alpha-methylallyltrimetherythrene,

yl-ammonium chlorid is converted into the ammonium hydroxid in the same manner as described above. posed by distilling the aqueous solution, or the ammonium halogenid by distilling the aqueous solution, or the ammonium halogenid is directly heated with pulverized caustic potash, calcium oxid or barythydrate under suitable addition of a small quantity of alcohol or water, whereby erythrene is formed with theoretical yield. It is "conducted through dilute sulfuric acid, dried over calcium chlorid and condensed by coolmg.

We claim The process of producing erythrene which comprises completely alkylating alpha-methylallyl-dimethylamin, and decomposing the resulting quaternary ammonium compounds, substantially as described. I

In testimony whereof we have hereunto set ourha-nds in the presence of two subscribing witnesses.

GEORG MERLlING.

1 HUGO KOHLER. [L. s.] Witnesses:

HELEN Nome. ALBERT Nome.

This product is decom- 

